Compressing and restoring method of image data based on dot...

Details Compressing and restoring method of image data based on dot... Compressing and restoring method of image data based on dot...

2007-10-09

2007-10-09

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Predictive coding

C382S176000, C382S239000, C358S003120

Reexamination Certificate

active

10148893

ABSTRACT:
A method for compressing/restoring image data free from degradation of image quality caused by compression/decompression, a method for compressing image data at high compression ratio, and its restoring method are disclosed. In the image data compressing method, image elements contained in a digital image read from a sheet of paper are extracted (S02), each of the extracted image elements (51-53) is subjected to data compression by a compression method corresponding to the type of the image element (S03-S05), and the compressed image element data (54-56) are stored.

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